1. Stratification of rocks into beds. 
   层理岩石层理形成地层
2. Dredged up the silt. 
   挖出淤泥
3. silt storage dam for farmland building 
   淤地坝
4. A deposit, as of ore, parallel to local stratification. 
   沉积物平行于局部地层的沉积物，如矿层
5. a fine-grained sandstone of consolidated silt. 
   一种细颗粒的砂岩，由固化的泥沙形成。

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• 1. 淤泥层
  silt stable channel 冲淤平衡渠道...silt stratification 淤泥层...silt trap 淤泥沉积地; 截砂器
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